Roachcoach is at least half right. If we think of a WAIT as waiting on something to get done (what else would it be), then there are really only two ways to deal with it. Here are these two ways in priority order.

1. change what you do so you need less of whatever you are waiting on
2. make whatever you are waiting on faster

My first question though is, DO YOU HAVE A PROBLEM? or are you just looking at some stat and thinking "hey that is the biggest one so if I make it smaller things will be better."?

Do you have a user complaining that something is taking too long or a process not meeting an SLA? If not then there is no need to "tune this wait event" because "direct path write temp 7046394"
means pretty much nothing given a lack of context.